Answer Posted / trupti
Zero Suppression: suppose a DPT is mounted at the bottom of
the tank through an impulse pipeline,then even if the tank
is empty the impulse pipeline will have some water in it.
This water will exert pressure on the HP side of the DPT
and we will get some output even if the tank is empty.so
the output need to be supressed to the zero value
Zero Elevation:suppose a DPT is mounted at the bottom of
the closed tank and to the LP the impulse tube which is
connected is filled with a refrence liquid.Then the
pressure exerted on LP>HP.Hence the output will be
negative .So it has to be elevated to reach the zero level
Is This Answer Correct ? | 130 Yes | 13 No |
Post New Answer View All Answers
Draw a complete P&ID of a flow suction tank indicating all control & protection equipment. Indicate all its inlets and outlets. Explain the controls for this system
Why are the uses 24vdc in industries
how the arrangement of equipments done in control room
Why MUX JB's are using only Temperature Element in Fundation field bus?
How to calibrate level transmitter with use of HART?
Q- Control problem are mainly classified in _____ types. a-)4 b-)3 c-)6 d-)nono of these Few of them i know is 1- regulator type problem (eg- Air conditioner) 2- tracking problem (eg missile trcking problem) 3- sybernatics 4- optimal control problem
What is zone,loop/fire alarm system?
i have steam drum height 1000mm. and i want to placed the transmitter below the tap.how i calculate.
which type inter lock use in petrochemical refinery,and oil & gas?
What is shielding effect?
in mass flow meter what is drive friquancy ?
Explain the use of hair spring in the pressure gauge.
what is dc moter.
Questions on flow meters,few questions on HART protocol,
Pressure tx shows 1 mbar but we need 1000 mbar at this process condition .. how can we sort it out .